Round cornering machine



Oct. 27, 1953 c. c. cRuzAN ROUND CORNERING MACHINE 4 Sheets-Sheet l Filed May l1, 1951 M .y Z E DoA a N m W V 7 N .RN e f- WM www .Q 1/i|1 A@ m A .y f i] u W .nw VA \h.\ J @ll MW Il: mkv O .WMJ -l Q .Q mh O Q Wmmvm. RL o, .O l X ||||||||l| www? e $5. O@ Tw kwal@ C @ATI -kum hv. ,Yr lliffll H w %5. MY QW UQ mw Oct. 27, 1953 c. c. cRUzAN 2,656,888

ROUND CORNERING MACHINE Filed May ll, 1951 4 Sheets-Sheet 2 Oct. 27, 1953 c. c. cRUzAN 2,656,888

ROUND CORNERING MACHINE Filed May ll, 1951 44 Sheets-Sheet 3 g INVENTOR. ,--.4 ifm/71556? kaza/v BY y W HTTIP/Vf/ Oct. 27, 1953 c. c. cRUzAN ROUND coRNERING MACHINE 4 Sheets-Sheet 4 Filed May 11, 1951 JNVENTOR. 3M/715s* Praz/qw' BY I www.

Patented Oct. 27, 1953 ROUND CORNERING MACHINE Charles C. Cruzan, Salt Wire- Corporation, corporation of New York Point, N. Y., assignor to oughkeepse, N. Y., a.

Application May 11, 1951, Serial No. 225,763

2 Claims.

The invention here disclosed is a machine for rounding the outer corners of book leaves and covers.

Special objects of the invention are to provide a machine for this purpose which will automatically line up a stack or group of leaves or covers inserted in the machine, hold them in this condition and then simultaneously cut both corners, all as a single, continuing operation or cycle of the machine.

Other special objects of the invention are to provide a machine of this character of simple, substantial design, free ci vibrational or other disturbing tendencies and which will carry out the Work intended with Iaccuracy and eiliciency.

Other desirable objects attained by the invention are set forth or will appear in the course of the following specification.

The drawings accompanying and forming part of the specification illustrate a present preferred embodiment of the invention. Structure, however, may be modified and changed as regards the immediate illustration, all within the true intent and broad scope of the invention as hereinafter deiined and claimed.

Fig. 1 in the drawings is a broken and part sectional top plan view of one of the new cornering machines;

Fig. 2 is a front elevation of the same with portions of the base structure broken away to disclose parts Within the same;

Fig. 3 is an enlarged broken end elevation of the right-hand end of the machine shown in Fig. 2;

Fig. i is a broken vertical sectional view of the machine as taken on substantially the plane of line 4--4 of Fig. 2;

Fig. 5 is a part sectional fragmentary view of the jogger cam mechanism as taken on substantially the plane of line 5 5 of Fig. 2;

Fig. 6 is a broken horizontal sectional view of the right-hand jogger and cutter, as appearing on substantially the plane of line tof Fig. 2;

Fig. '.7 is a broken part sectional fragmentary view of the jogger cam mechanism, as viewed from the front of the machine;

Fig. 8 is a broken vertical sectional detail of the right-hand cutter head as on substantially the plane of line 8-8 of Fig. l.

The base portion of the machine is shown as comprising a cabinet type base structure ill carrying a substantial bed plate II. The latter is shown as slotted across the width of the machine at I2, and as shouldered along `the opposing edges of the opening to provide supporting tracks or Y rods 4| with journals `trated by a cam bar rails I3 below the top surface of the bed or table structure.

Supported on the opposing tracks or shoulders I3 are two base plates I4 and I5, the one at the left, I4, being bolted down fast on the bed by underlying clamp I5 and clamp bolt il', Fig, 4, and the other slidingly conned on the bed by overlying retainer plates I8, Figs. l and 2.

The gages and cutter heads for the two corners which are to be rounded are mounted on these base plates and the right-hand, slidingly supported unit is operated as a jogger to square up the stack against the xedly secured unit.

In the plan view, Fig. l, the front gages are designated I9, 29, mounted on iixed and movable plates I4, I5, respectively, and the side gages 2|, 22, mounted on these base plates. n

The left-hand cutter comprises a concave corner rounding knife 23, Figs. l and 8, cooperable with a correspondingly shaped bottom die 24, the knife being carried by a slide z'vertically operable in the corner bracket guide 26.

Similarly, the right-hand cutter is made up of a corner cutting knife 2T carried by slide 28 operating in guide bracket 29 and cooperable with a bottom die 30.

As shown particularly in Fig. 8, the bottom dies 24 and 39 are slidingly seated in recesses 3l in the base plates I4, I5, and adjustably held in respect tothe knives by backing screws 32 and by hold-down screws 33 in the slots 34 in the dies.

The cutter knives are actuated by a vertically reciprocating beam or ram 35 shown as having an undercut groove 36 across the bottom of the same, receiving `the heads 31 of screw studs 38 adjustably secured in the 'upper ends of cutter slides 25 and 28.

n Reciprocation of the beam is effected by cranks 39 on opposite ends of a cross shaft til journaled in the lower portion of thebase and connected by 42 on the ends of the beam.

Straight up and down movement of the beam is maintained by rectilinear guide blocks 43 on the ends of the beam sliding over vertical guides 44 carried by upright the bed plate. Horizontal reciprocation of the jogger slide I5 is eifected in the machine illus- 46 having a head 41 at the with a roller 49 attached to the sliding base plate;

Specically the cam bar 4S is shown as slidingly operating down through a slot 50 in the stationaryl guide tube 5I outstandingV from the end` of standards 45 at the ends of machine with the the bed plate and slidingly receiving the stud 52, Figs. 6 and 1, projecting from the end of the sliding base I5, said stud having a slot 53 receiving the cam and in which the roller 49` is journaled, in position to serve as a friction reducing cam follower.

Springs 54 bearing on the sliding jogger plate l at opposite sidesv of the projection 52, Fig. 1, thrust this plate inward to the extent permitted by the cam 46, tension of these springs being adjustable by set screws 55.

The stack of leaves, covers or other parts indicated at 56, is held in the squared-up position against the gages by hold-down 4plungers 51 operating in guides 58 carrying the thrust springs 59 and adjustably secured on the beam by bolts 60, Fig. 4, having their heads caught in the undercut groove 6| provided in the top of the beam.

In the machine shown, power is supplied by a motor 62 mounted in the base and geared at 63 to the crank-shaft through the medium of al onerevolution clutch 64 controlled by foot pedal 65.

To prevent coasting and to stop and hold the ram at the top of its stroke, as shown in Fig. 2, a brake is provided in the form of horizontally connected clamp members 66, 61, Fig. 4, surrounding a brake drum 68 on the crank-shaft 40, these members at the open side of the brake both .engaged over a support rod 69 lwith the back member of the brake-band, 66, bearing against a spacer sleeve 10 on the rod, and the front member engaged by spring 1I tensioned by thumb nut 12 screwed over the end of the rod.

With this simple construction the holding tension of the brake may be readily adjusted at any time by this single thumb nut.

The cam bar 46 is shown as having vertical adjustmentthrough the medium of a turnbuckle screw 13, Figs. 5 and 7, enabling positioning of the cam 4,8 to eifect desired action of the jogger.

The bolt 38, Fig. 8, of the right-hand cutter slide has a free sliding engagement in the undercut groove 36 in the beam so as not to interfere with the jogging movement of this combined cutting and gaging unit.

Similarly, the head of the cutter slide bolt 38 for the left-hand guiding and gaging unit has free engagement in the undercut groove of the beam so as not to interfere with late-ral sliding adjustment of that unit on the bed to suit different widths of stock being cornered.

To set the machine for diierent size stock, it is therefore only necessary to loosen clamp bolt I1, Fig. 4, and shift the relatively stationary cutter head laterally on the supporting shoulders I3 and then clamp it in position on the bed, where the front and side gages I9, 2|, thereon will locate the left-hand corner of the stock in proper position for lateral jogging by the right-hand side gage22, Fig. l.

The machine may vthus be Vquickly set up' for different size sheets and ateach strokev the stock, engaged with the stationary front and sidev gages, will be automatically jogged by the right-hand gage and be held in order by the spring tensioned hold-down plungers 51 while the corners arebeing simultaneously cut by the two cornering knives 23 and 21.

The parts are all of substantial construction.

. The bed plate provides means for maintaining all parts in accurate alignment. The crank-.shaft Vmounted low in the base Yand connected With the raml at the top by long connecting rods, assures 4 balance and smooth running operation or twisting tendencies of the quiet, powerproper and avoids binding vertically sliding beam. Smooth, ful action is thus assured.

While particularly designed for round cornering operations and generally referred to as a round cornering machine, it will be clear that the machine may be employed for other purposes, for mstance, for cutting index tabs and the like. Y

The front and side gages, knives and dies for each cutter head unit, if the corners are to be the same, as they usually are, may be exact o-r substantial duplicates, providing the advantage of interchangeability of parts. On the other hand, the two corners may be cut differently, the invention allowing for this possibility, through use of appropriately designed knives and. dies at the respective cutter heads. In any event, both corner cuts are made at the same time. All that the operator has to do is to insert the stack of sheets, book covers or leaves into the machine, up against the stationary front stop I9 and side gage 2l and step on the pedal 65, whereupon the right-hand side gage 22 and front stop 20 on the sliding plate I5 will square up the stack and in this action the hold-down plungers 51 will come down to grip and hold the corner portions of the stack while the knives 23, 21, are making the corner forming cuts, the cycle ending with the beam in the raised position, Figs. 1, 3 and 4, with the hold-down plungers lifted and the iinished stack free to be removed.

Instead of feeding the machine by hand it is evident that automatic feed may be employed.

The bed plate, serving as a table for the support of the stack, may be extended to provide any desired table area.

Waste material may be collected in a chute indicated at 14, Figs. 2 and 4, large enough to collect the cuttings, regardless of adjustments of the cutter heads, and to deliver them out through an opening 15 in the back 0f the base.

The jogging, right-hand side gage comes in with a spring action and firmly engages the side of the stack so that the cutting knife on this head at all times is adjusted to the proper size regardless of small variations present in commercially cut paper. This second head, therefore, is perfectly adjusted to the proper cutting position at each stroke, making it practical to cut both corners at the same time.

The opening movement of the gage and head is important also in permitting the sheets to be easily fed in between the two gages, with sufcient room to spare to permit the easy insertion of the paper.

While this machine generally is considered and referred to as a round cornering machine, it is evident that it is adapted to other purposes and that, accordingly, this title is not employed in a restrictive sense.

What is claimed is:

l. A round cornering machine comprising a table for supporting a stack of sheets, basesY transversely adjustable on said table toward and away from each other, dies and companion cornering knives mounted on said bases, gages for opposite edges of the stack on said bases' means for securing one of said bases relatively stationary in transversely adjusted relation .on the table, means slidingly coniining the other base on` the table for jogging action in respect to the stationary base, a vertically reciprocating beam extending across the table above said bases, said knives having projecting studs in transversely slidable engagement with said beam whereby said knives will be actuated regardless of transverse adjustment of the relatively stationary base and regardless of jogging movements of the other base and means connected with said beam for effecting the jogging movement of said jogging base.

2. A round cornering machine comprising a table for supporting a stack of sheets, bases transversely adjustable on said table toward and away from each other, dies and companion cornering knives mounted on said bases, gages for opposite edges of the stack on said bases, means for securing one of said bases relatively stationary in transversely adjusted relation on the table,Y

means slidingly confining the other base on the table for jogging action in respect to the stationary base, a vertically reciprocating beam eX- tending across the table above said bases, said knives having projecting studs in transversely slidable engagement with said beam whereby said knives will be actuated regardless of transverse adjustment of the relatively stationary base and regardless of jogging movements of the other base, means connected with said beam for effecting the jogging movement of said jogging base and spring tensioned hold-down plungers transversely adjustable on the bar between the connection of the projecting studs therewith and positioned to bear down on the stack after the jogging action and prior to engagement of the knives therewith.

CHARLES C. CRUZAN.

References Cited in the le of this patent UNITED STATES PATENTS Number Name Date 1,122,440 Thomas Dec. 29, 1914 1,161,765 Lloyd Nov. 23, 1915 1,752,125 Thorne Mar. 25, 1930 1,773,457 Howard Aug. 19, 1930 1,949,764 Schreiber Mar. 6, 1934 2,114,259 Trussell Apr. 12, 1938 2,208,966 Eickman July 23, 1940 

